Dev tools · alternatives · 2026

24 alternatives to Pollux

Fake json data & json server mock API generator with JWT

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Pollux launched in 2021; newer entries below may have overtaken it.

1. 1
   Mock API Generator▲548

   Generate custom data & API to build apps in less than 30s

   2021 · its alternatives →

2. 2GJ
   Generate JSON mock data for testing/initial app development▲103

   2023 · jsongenerator.io · its alternatives →

3. 3
   JSON Generator▲139

   Create mock and sample JSON using a powerful template syntax

   2014 · its alternatives →

4. 4
   Mock Turtle▲72

   GUI approach to generating realistic mock JSON data

   2022 · its alternatives →

5. 5
   FakeURL▲6

   Free online api mocking tool | mock api generator

   2025 · fakeurl.dev · its alternatives →

6. 6
   JSON url▲119

   Mock backend with JSON generated from URL

   2022 · its alternatives →

7. 7
   AI-Powered Mock API Generator▲86

   Generate customized, realistic mock data & APIs, via GPT

   2023 · its alternatives →

8. 8
   JSONing Mock API▲6

   Free and open source fake API for testing and prototyping

   Nov 2025 · jsoning.com · its alternatives →

9. 9CM
   Creating mock data using TypeScript interfaces▲57

   2023 · butlermock.online · its alternatives →

10. 10
    Mocktail – Free, open-source mock API server with a built-in dashboard▲25

    Hi HN, I built the first version of Mocktail years ago. I recently came back to the project, and after a pretty substantial rebuild, v4 is now out. Mocktail is a free and open-source, self-hosted mock API server with a built-in dashboard and database, packaged as a single ~25 MB binary. You can run it locally or on your own infrastructure — no account or hosted service required. You can define endpoints and responses, generate realistic data per request, customize headers, status codes and latency, and inspect incoming requests in real time. With v4, I also added MCP support, so coding…

    26d ago · getmocktail.com · its alternatives →

11. 11
    Data Populator▲149

    Sketch and XD plugin to populate mockups with real data.

    2019 · its alternatives →

12. 12
    Mocklets▲82

    A HTTP-based API simulator to assist parallel development 🛠️

    2018 · its alternatives →

13. 13
    MockThis▲80

    Generate mock data using AI

    2023 · its alternatives →

14. 14
    Generate JSON▲77

    AI-generated dummy JSON - deploy in seconds

    2023 · its alternatives →

15. 15
    Fake API for Devs▲8

    Free mock api generator for developers | instant test data

    Nov 2025 · fakeapifordevs.vercel.app · its alternatives →

16. 16
    Mock Maker▲93

    Effortless mock APIs for seamless testing & prototyping

    2024 · its alternatives →

17. 17AN
    API-Now: A Mock API Server Serves JSON, JavaScript File or Faker Data▲5

    2019 · github.com · its alternatives →

18. 18
    Mock Data Generator▲4

    Paste real JSON, get 1,000 coherent rows that match it

    Jun 2026 · jsondevtools.org · its alternatives →

19. 19MM
    Mockoon – mock REST APIs in seconds▲68

    2017 · mockoon.com · its alternatives →

20. 20
    Mockreate▲66

    Figma plugin to generate & customise random data for designs

    2022 · its alternatives →

21. 21
    Fake Power▲2

    Generate fake JSON based on your schema with tons of data

    2023 · its alternatives →

22. 22JG
    JSONMocker – generate JSON mock data by writing reusable JSON schemas▲5

    2023 · laurawebdev.github.io · its alternatives →

23. 23
    Rest Faker▲13

    Generate complete REST APIs with CRUD in matter of seconds

    Jun 2026 · its alternatives →

24. 24JH
    JSONator – HTTP endpoints for mock data▲7

    2014 · jsonator.herokuapp.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →